656525 - Intel OpenGL scrolling terrible performance

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[Brandon Watkins]

User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:6.0a1) Gecko/20110508 Firefox/6.0a1
Build Identifier: Mozilla/5.0 (X11; Linux x86_64; rv:6.0a1) Gecko/20110508 Firefox/6.0a1

I have a core i5 460m with intel HD graphics. If I force opengl hardware acceleration smooth scrolling becomes much, much less smooth.

Smooth scrolling is basically not usable when hardware acceleration is enabled.

I am running ubuntu 11.04.
Graphics
      
Adapter Description: Tungsten Graphics, Inc -- Mesa DRI Intel(R) Ironlake Mobile GEM 20100330 DEVELOPMENT 

Driver Version: 2.1 Mesa 7.10.2

WebGL Renderer: Tungsten Graphics, Inc -- Mesa DRI Intel(R) Ironlake Mobile GEM 20100330 DEVELOPMENT  -- 2.1 Mesa 7.10.2

GPU Accelerated Windows1/1

Reproducible: Always

Steps to Reproduce:
1.Set layers.acceleration.force-enabled to true
2.Scroll with "smooth scrolling" enabled

Actual Results:  
Poor scrolling performance.

Expected Results:  
Hardware acceleration is supposed to improve scrolling performance.

Ausus U52F
Ubuntu Natty 64 bit
Firefox 6 nightly
Intel core i5 460m HD graphics

Comment 1

[George Carstoiu]

Mozilla/5.0 (X11; Linux x86_64; rv:7.0a1) Gecko/20110619 Firefox/7.0a1

According to https://wiki.mozilla.org/Blocklisting/Blocked_Graphics_Drivers#OpenGL_on_X11_in_Firefox_6_and_newer , you should not have any problems with you drivers.

Setting status to New.

Comment 2

[Brandon Watkins]

Yeah, according to that page the driver should be whitelisted by default? Strange. In firefox 6 I get nothing in about:support under the graphics section until I force layers on. As soon as I force layers on I get accelerated windows 1/1 ect... and I can definitely tell its enabled because of the issues I run into (smooth scrolling is very laggy as I described.)

I am running arch linux now so I have very up to date mesa/intel drivers as well, and have the same issue.

I seem to have the same issue with the firefox 7 builds as well.